// Initialize the push button
void pb_init(void){
// Set initial values
pbState = READY;
pbTenths = 0;
pbLongPress = false;
pbShortPress = false;
// Set up timer interrupt
Chip_MRT_IntClear(LPC_MRT_CH(0));
Chip_MRT_SetEnabled(LPC_MRT_CH(0));
// Set up pin interrupt
Chip_PININT_Init(LPC_GPIO_PIN_INT);
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_PININT);
Chip_SYSCTL_PeriphReset(RESET_PININT);
Chip_INMUX_PinIntSel(0, 0, PWR_PB_SENSE);
Chip_PININT_ClearIntStatus(LPC_GPIO_PIN_INT, 1 << 0);
Chip_PININT_SetPinModeLevel(LPC_GPIO_PIN_INT, 1 << 0);
PININT_EnableLevelInt(LPC_GPIO_PIN_INT, 1 << 0);
PININT_LowActive(LPC_GPIO_PIN_INT, 1 << 0); // Enable low first so that initial press is not detected
NVIC_ClearPendingIRQ(PIN_INT0_IRQn);
NVIC_EnableIRQ(PIN_INT0_IRQn);
NVIC_SetPriority(PIN_INT0_IRQn, 0x02); // Set higher than systick, but lower than sampling
}
void gpio_irq_enable(gpio_irq_t *obj) {
switch(obj->event){
case IRQ_EDGE_RISE:
Chip_PININT_SetPinModeEdge(LPC_PININT, obj->irq_index); /* edge sensitive */
Chip_PININT_EnableIntHigh(LPC_PININT, obj->irq_index); /* Rising edge interrupt */
break;
case IRQ_EDGE_FALL:
Chip_PININT_SetPinModeEdge(LPC_PININT, obj->irq_index); /* Edge sensitive */
Chip_PININT_EnableIntLow(LPC_PININT, obj->irq_index); /* Falling edge interrupt */
break;
case IRQ_LEVEL_HIGH:
Chip_PININT_SetPinModeLevel(LPC_PININT, obj->irq_index); /* Level sensitive */
Chip_PININT_EnableIntHigh(LPC_PININT, obj->irq_index); /* High level interrupt */
break;
case IRQ_LEVEL_LOW:
Chip_PININT_SetPinModeLevel(LPC_PININT, obj->irq_index); /* Level sensitive */
Chip_PININT_EnableIntLow(LPC_PININT, obj->irq_index); /* Low level interrupt */
break;
default:
D1_printf("GPIO_IRQ_ENABLE: Bad IRQ Mode: %d\r\n", obj->irq_index);
while(1){};
}
}
bool Board_GPIOs_enableIntCallback(int gpioNumber,void(*function)(void*),void* arg, uint8_t flagEdgeLevel, uint8_t flagHighLow)
{
// check if gpio alerady has assigned int
for(uint8_t i=0; i<4 ; i++)
{
if(extIntData[i].callback!=NULL && extIntData[i].gpioNumber==gpioNumber)
return 0;
}
// find free extInt callback
for(uint8_t i=0; i<4 ; i++)
{
if(extIntData[i].callback==NULL)
{
extIntData[i].callback = function;
extIntData[i].callbackArg = arg;
extIntData[i].gpioNumber=gpioNumber;
// Enable interrupt
uint8_t intNumber = i + 4; // starts from INT4
Chip_SCU_GPIOIntPinSel(intNumber, gpiosInfo[gpioNumber].gpio, gpiosInfo[gpioNumber].gpioBit);
Chip_PININT_ClearIntStatus(LPC_GPIO_PIN_INT, PININTCH(intNumber));
if(flagEdgeLevel)
Chip_PININT_SetPinModeEdge(LPC_GPIO_PIN_INT, PININTCH(intNumber));
else
Chip_PININT_SetPinModeLevel(LPC_GPIO_PIN_INT, PININTCH(intNumber));
if(flagHighLow)
Chip_PININT_EnableIntHigh(LPC_GPIO_PIN_INT, PININTCH(intNumber));
else
Chip_PININT_EnableIntLow(LPC_GPIO_PIN_INT, PININTCH(intNumber));
switch(intNumber) {
case 4: NVIC_ClearPendingIRQ(PIN_INT4_IRQn); NVIC_EnableIRQ(PIN_INT4_IRQn); break;
case 5: NVIC_ClearPendingIRQ(PIN_INT5_IRQn); NVIC_EnableIRQ(PIN_INT5_IRQn); break;
case 6: NVIC_ClearPendingIRQ(PIN_INT6_IRQn); NVIC_EnableIRQ(PIN_INT6_IRQn); break;
case 7: NVIC_ClearPendingIRQ(PIN_INT7_IRQn); NVIC_EnableIRQ(PIN_INT7_IRQn); break;
}
return 1;
}
}
return 0;
}
void Board_Attach_Interrupt(uint32_t ulPin, void (*callback)(void), uint32_t mode)
{
uint8_t port = 1;
uint8_t pin = 24;
uint8_t pinIntChannel = 0;
LPC1347_IRQn_Type pinIntIRQ = PIN_INT0_IRQn;
port = APIN_PORT(ulPin);
pin = APIN_PIN(ulPin);
pinIntChannel = APIN_INT(ulPin);
if(pinIntChannel == EXT_INT_0)
{
pinIntIRQ = PIN_INT0_IRQn;
callbackPinIntA = callback;
}
else if(pinIntChannel == EXT_INT_1)
{
pinIntIRQ = PIN_INT1_IRQn;
callbackPinIntB = callback;
}
else if(pinIntChannel == EXT_INT_2)
{
pinIntIRQ = PIN_INT2_IRQn;
callbackPinIntC = callback;
}
else if(pinIntChannel == EXT_INT_3)
{
pinIntIRQ = PIN_INT3_IRQn;
callbackPinIntD = callback;
}
/* Configure GPIO pin as input */
Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, port, pin);
/* Configure pin as GPIO with pulldown */
// All digital pins are selected such that GPIO is on IOCON_FUNC0
Chip_IOCON_PinMuxSet(LPC_IOCON, port, pin, (IOCON_FUNC0 | IOCON_MODE_PULLDOWN));
/* Enable PININT clock */
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_PINT);
/* Configure interrupt channel for the GPIO pin in SysCon block */
Chip_SYSCTL_SetPinInterrupt(pinIntChannel, port, pin);
/* Configure channel interrupt as edge sensitive and falling edge interrupt */
Chip_PININT_ClearIntStatus(LPC_PININT, PININTCH(pinIntChannel));
if(mode == HIGH)
{
Chip_PININT_SetPinModeLevel(LPC_PININT, PININTCH(pinIntChannel));
Chip_PININT_EnableIntHigh(LPC_PININT, PININTCH(pinIntChannel));
}
else if(mode == LOW)
{
Chip_PININT_SetPinModeLevel(LPC_PININT, PININTCH(pinIntChannel));
Chip_PININT_EnableIntLow(LPC_PININT, PININTCH(pinIntChannel));
}
else if(mode == RISING)
{
Chip_PININT_SetPinModeEdge(LPC_PININT, PININTCH(pinIntChannel));
Chip_PININT_EnableIntHigh(LPC_PININT, PININTCH(pinIntChannel));
}
else if(mode == FALLING)
{
Chip_PININT_SetPinModeEdge(LPC_PININT, PININTCH(pinIntChannel));
Chip_PININT_EnableIntLow(LPC_PININT, PININTCH(pinIntChannel));
}
else if(mode == CHANGE)
{
Chip_PININT_SetPinModeEdge(LPC_PININT, PININTCH(pinIntChannel));
Chip_PININT_EnableIntHigh(LPC_PININT, PININTCH(pinIntChannel));
Chip_PININT_EnableIntLow(LPC_PININT, PININTCH(pinIntChannel));
}
/* Enable interrupt in the NVIC */
NVIC_ClearPendingIRQ(pinIntIRQ);
NVIC_EnableIRQ(pinIntIRQ);
}
